Frame for a treadmill



FIG. 1 is a perspective view of a frame for a treadmill, showing my new design.

FIG. 2 is a side view thereof.

FIG. 3 is an opposite side view thereof.

FIG. 4 is a rear view thereof.

FIG. 5 is a front view thereof; and,

FIG. 6 is a top view thereof.

The broken lines in the drawings illustrate portions of the frame that are not part of the claimed design. 

CLAIM The ornamental design for a frame for a treadmill, as shown and described. 